package collection;

import com.sun.corba.se.impl.protocol.giopmsgheaders.CancelRequestMessage_1_2;

import java.util.ArrayList;
import java.util.Collection;

public class CollectionOperDemo {
    public static void main(String[] args) {
        Collection c1 = new ArrayList();
        c1.add("java");
        c1.add("c++");
        c1.add(".net");
        System.out.println("c1:"+c1);

        Collection c2 = new ArrayList();
        c2.add("android");
        c2.add("ios");
        c2.add("java");
        System.out.println("c2:"+c2);

        c1.addAll(c2);//将c2添加到c1中
        System.out.println("c1:"+c1);
        System.out.println("c2:"+c2);

        Collection c3 = new ArrayList();
        c3.add("c++");
        c3.add("android");
        c3.add("php");
        System.out.println("c3:"+c3);

        boolean contains = c1.containsAll(c3);  //
        System.out.println("是否包含："+contains); //false

        //取交集：c1中仅保留与c3中所共有的元素，而c3不变
        c1.retainAll(c3);
        System.out.println("c1:"+c1); //c1:[c++,android]
        System.out.println("c3:"+c3); //c3:[c++,android,php]

        //删交集：将c1到c3共有的元素删除，c3不变
        c1.removeAll(c3);
        System.out.println("c1:"+c1);
        System.out.println("c3:"+c3);

    }
}
